1
digest_constant = "hello";
7
/* Starts the console server.
8
* Returns an object with fields "host", "port", "magic" describing the
11
function start_server()
13
var xhr = ajax_call("consoleservice", "start", {}, "POST");
14
var json_text = xhr.responseText;
15
return JSON.parse(json_text);
20
/* Start the server */
21
var server_info = start_server();
22
server_host = server_info.host;
23
server_port = server_info.port;
24
server_magic = server_info.magic;
27
/* Below here imported from trunk/console/console.js
1
/* IVLE - Informatics Virtual Learning Environment
2
* Copyright (C) 2007-2008 The University of Melbourne
4
* This program is free software; you can redistribute it and/or modify
5
* it under the terms of the GNU General Public License as published by
6
* the Free Software Foundation; either version 2 of the License, or
7
* (at your option) any later version.
9
* This program is distributed in the hope that it will be useful,
10
* but WITHOUT ANY WARRANTY; without even the implied warranty of
11
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12
* GNU General Public License for more details.
14
* You should have received a copy of the GNU General Public License
15
* along with this program; if not, write to the Free Software
16
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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* Module: Console (Client-side JavaScript)
19
* Author: Tom Conway, Matt Giuca
25
/* Begin religious debate (tabs vs spaces) here: */
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/* (This string will be inserted in the console when the user presses the Tab
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/* Console DOM objects */
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console_filler = null;
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windowpane_mode = false;
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server_started = false;
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/* Starts the console server, if it isn't already.
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* This can be called any number of times - it only starts the one server.
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* Note that this is asynchronous. It will return after signalling to start
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* the server, but there is no guarantee that it has been started yet.
43
* This is a separate step from console_init, as the server is only to be
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* started once the first command is entered.
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* Does not return a value. Writes to global variables
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* server_host, and server_port.
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* \param callback Function which will be called after the server has been
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* started. No parameters are passed. May be null.
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function start_server(callback)
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var callback1 = function(xhr)
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var json_text = xhr.responseText;
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server_key = JSON.parse(json_text);
62
server_started = true;
68
if(typeof(current_path) != 'undefined')
70
// We have a current_path - give a suggestion to the server
72
if (current_file.isdir)
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path = path_join("/home", current_path);
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// Editor - need to chop off filename
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var tmp_path = current_path.split('/');
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path = path_join("/home", tmp_path.join('/'));
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ajax_call(callback1, "consoleservice", "start", {"startdir": path}, "POST");
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// No current_path - let the server decide
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ajax_call(callback1, "consoleservice", "start", {}, "POST");
93
/** Initialises the console. All apps which import console are required to
95
* Optional "windowpane" (bool), if true, will cause the console to go into
96
* "window pane" mode which will allow it to be opened and closed, and float
98
* (Defaults to closed).
100
function console_init(windowpane)
102
/* Set up the console as a floating pane */
103
console_body = document.getElementById("console_body");
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/* If there is no console body, don't worry.
105
* (This lets us import console.js even on pages without a console box */
106
if (console_body == null) return;
107
console_filler = document.getElementById("console_filler");
110
windowpane_mode = true;
115
/** Hide the main console panel, so the console minimizes to just an input box
116
* at the page bottom. */
117
function console_minimize()
119
if (!windowpane_mode) return;
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console_body.setAttribute("class", "windowpane minimal");
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console_filler.setAttribute("class", "windowpane minimal");
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/** Show the main console panel, so it enlarges out to its full size.
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function console_maximize()
128
if (!windowpane_mode) return;
129
console_body.setAttribute("class", "windowpane maximal");
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console_filler.setAttribute("class", "windowpane maximal");
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/* current_text is the string currently on the command line.
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* If non-empty, it will be stored at the bottom of the history.
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function historyUp(current_text)
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/* Remember the changes made to this item */
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this.edited[this.cursor] = current_text;
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this.earliestCursor = this.cursor;
41
function historyDown()
147
function historyDown(current_text)
43
if (this.cursor < this.items.length)
149
/* Remember the changes made to this item */
150
this.edited[this.cursor] = current_text;
151
if (this.cursor < this.items.length - 1)
204
* This is a fairly complex mechanism due to complications when editing
205
* history items. We store two arrays. "items" is the permanent history of
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* each item. "edited" is a "volatile" version of items - the edits made to
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* the history between now and last time you hit "enter".
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* This is because the user can go back and edit any of the previous items,
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* and the edits are remembered until they hit enter.
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* When hitting enter, the "edited" version of the currently selected item
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* replaces the "item" version of the last item in the list.
213
* Then a new blank item is created, for the new line of input.
214
* Lastly, all the "edited" versions are replaced with their stable versions.
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* Cursor never points to an invalid location.
91
218
function History()
93
this.items = new Array();
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this.items = new Array("");
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this.edited = new Array("");
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this.earliestCursor = 0;
95
224
this.up = historyUp;
96
225
this.down = historyDown;
97
226
this.curr = historyCurr;
98
this.add = historyAdd;
227
this.submit = historySubmit;
99
228
this.show = historyShow;
102
231
var hist = new History();
104
function enter_line()
106
var inp = document.getElementById('inputText');
107
var digest = hex_md5(inp.value + magic);
108
var args = {"host": server_host, "port": server_port,
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"digest":digest, "text":inp.value};
110
var xmlhttp = ajax_call("consoleservice", "chat", args, "POST");
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var res = JSON.parse(xmlhttp.responseText);
113
var output = document.getElementById("output");
115
var pre = document.createElement("pre");
116
pre.setAttribute("class", "inputMsg");
117
pre.appendChild(document.createTextNode(inp.value + "\n"));
118
output.appendChild(pre);
233
function set_interrupt()
238
function clear_output()
240
var output = document.getElementById("console_output");
241
while (output.firstChild)
243
output.removeChild(output.firstChild);
247
/** Send a line of text to the Python server, wait for its return, and react
248
* to its response by writing to the output box.
249
* Also maximize the console window if not already.
251
function console_enter_line(inputbox, which)
255
if (typeof(inputbox) == "string")
257
var inputline = inputbox;
259
var graytimer = null;
263
GLOBAL_inputbox = inputbox; /* For timer */
264
var inputline = inputbox.value;
265
var graytimer = setTimeout("GLOBAL_inputbox.setAttribute(\"class\", "
266
+ "\"disabled\");", 100);
268
var output = document.getElementById("console_output");
271
var span = document.createElement("span");
272
span.setAttribute("class", "inputPrompt");
273
span.appendChild(document.createTextNode(">>> "));
274
output.appendChild(span);
275
// Print input line itself in a span
276
var span = document.createElement("span");
277
span.setAttribute("class", "inputMsg");
278
span.appendChild(document.createTextNode(inputline + "\n"));
279
output.appendChild(span);
281
var args = {"key": server_key, "text":inputline};
282
var callback = function(xhr)
284
console_response(inputbox, graytimer, inputline, xhr.responseText);
286
/* Disable the text box */
287
if (inputbox != null)
288
inputbox.setAttribute("disabled", "disabled");
289
ajax_call(callback, "consoleservice", which, args, "POST");
292
function console_response(inputbox, graytimer, inputline, responseText)
296
var res = JSON.parse(responseText);
300
alert("An internal error occurred in the python console.");
303
var output = document.getElementById("console_output");
120
304
if (res.hasOwnProperty('okay'))
123
// print out the output (res.okay[0])
124
var pre = document.createElement("pre");
125
pre.setAttribute("class", "outputMsg");
126
pre.appendChild(document.createTextNode(res.okay[0]));
127
output.appendChild(pre);
128
// print out the return value (res.okay[1])
131
var pre = document.createElement("pre");
132
pre.setAttribute("class", "outputMsg");
133
pre.appendChild(document.createTextNode(res.okay[1] + "\n"));
134
output.appendChild(pre);
136
306
// set the prompt to >>>
137
var prompt = document.getElementById("prompt");
307
var prompt = document.getElementById("console_prompt");
138
308
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
140
310
else if (res.hasOwnProperty('exc'))
143
313
// print out the error message (res.exc)
144
var pre = document.createElement("pre");
145
pre.setAttribute("class", "errorMsg");
146
pre.appendChild(document.createTextNode(res.exc));
147
output.appendChild(pre);
314
var span = document.createElement("span");
315
span.setAttribute("class", "errorMsg");
316
span.appendChild(document.createTextNode(res.exc + "\n"));
317
output.appendChild(span);
318
// set the prompt to >>>
319
var prompt = document.getElementById("console_prompt");
320
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
322
else if (res.hasOwnProperty('restart') && res.hasOwnProperty('key'))
324
// Server has indicated that the console should be restarted
326
// Get the new key (host, port, magic)
327
server_key = res.key;
329
// Print a reason to explain why we'd do such a horrible thing
330
// (console timeout, server error etc.)
331
var span = document.createElement("span");
332
span.setAttribute("class", "errorMsg");
333
span.appendChild(document.createTextNode("Console Restart: " + res.restart + "\n"));
334
output.appendChild(span);
335
// set the prompt to >>>
336
var prompt = document.getElementById("console_prompt");
337
prompt.replaceChild(document.createTextNode(">>> "), prompt.firstChild);
149
340
else if (res.hasOwnProperty('more'))
151
342
// Need more input, so set the prompt to ...
152
var prompt = document.getElementById("prompt");
343
var prompt = document.getElementById("console_prompt");
153
344
prompt.replaceChild(document.createTextNode("... "), prompt.firstChild);
346
else if (res.hasOwnProperty('output'))
348
if (res.output.length > 0)
350
output.appendChild(document.createTextNode(res.output));
352
var callback = function(xhr)
354
console_response(inputbox, graytimer,
355
null, xhr.responseText);
359
var kind = "interrupt";
365
var args = {"key": server_key, "text":''};
366
ajax_call(callback, "consoleservice", kind, args, "POST");
368
// Open up the console so we can see the output
369
// FIXME: do we need to maximize here?
373
divScroll.activeScroll();
375
// Return early, so we don't re-enable the input box.
156
379
// assert res.hasOwnProperty('input')
157
var prompt = document.getElementById("prompt");
380
var prompt = document.getElementById("console_prompt");
158
381
prompt.replaceChild(document.createTextNode("+++ "), prompt.firstChild);
384
if (inputbox != null)
386
/* Re-enable the text box */
387
clearTimeout(graytimer);
388
inputbox.removeAttribute("disabled");
389
inputbox.removeAttribute("class");
393
/* Open up the console so we can see the output */
396
divScroll.activeScroll();
398
// Focus the input box by default
399
document.getElementById("console_output").focus()
400
document.getElementById("console_inputText").focus()
162
403
function catch_input(key)
164
var inp = document.getElementById('inputText');
169
inp.value = hist.curr();
174
inp.value = hist.curr();
179
inp.value = hist.curr();
405
var inp = document.getElementById('console_inputText');
408
case 9: /* Tab key */
409
var selstart = inp.selectionStart;
410
var selend = inp.selectionEnd;
411
if (selstart == selend)
413
/* No selection, just a carat. Insert a tab here. */
414
inp.value = inp.value.substr(0, selstart)
415
+ TAB_STRING + inp.value.substr(selstart);
419
/* Text is selected. Just indent the whole line
420
* by inserting a tab at the start */
421
inp.value = TAB_STRING + inp.value;
423
/* Update the selection so the same characters as before are selected
425
inp.selectionStart = selstart + TAB_STRING.length;
426
inp.selectionEnd = inp.selectionStart + (selend - selstart);
427
/* Cancel the event, so the TAB key doesn't move focus away from this
430
/* Note: If it happens that some browsers don't support event
431
* cancelling properly, this hack might work instead:
433
"document.getElementById('console_inputText').focus()",
437
case 13: /* Enter key */
438
var callback = function()
440
/* Send the line of text to the server */
441
console_enter_line(inp, "chat");
442
hist.submit(inp.value);
443
inp.value = hist.curr();
445
/* Start the server if it hasn't already been started */
446
start_server(callback);
448
case 38: /* Up arrow */
450
inp.value = hist.curr();
452
case 40: /* Down arrow */
453
hist.down(inp.value);
454
inp.value = hist.curr();
459
/**** Following Code modified from ******************************************/
460
/**** http://radio.javaranch.com/pascarello/2006/08/17/1155837038219.html ***/
461
/****************************************************************************/
462
var chatscroll = new Object();
464
chatscroll.Pane = function(scrollContainerId)
466
this.scrollContainerId = scrollContainerId;
469
chatscroll.Pane.prototype.activeScroll = function()
471
var scrollDiv = document.getElementById(this.scrollContainerId);
472
var currentHeight = 0;
474
if (scrollDiv.scrollHeight > 0)
475
currentHeight = scrollDiv.scrollHeight;
477
if (objDiv.offsetHeight > 0)
478
currentHeight = scrollDiv.offsetHeight;
480
scrollDiv.scrollTop = currentHeight;
485
var divScroll = new chatscroll.Pane('console_output');